<script>
import {nanoid} from 'nanoid'

export default {
  props: {todoList: Array},
  name: "MyHeader",
  data() {
    return {
      content: '',
      todoArr: this.todoList
    }
  },

  methods: {
    addTodo() {
      if(!this.content.trim()){
        alert('请输入内容')
      }
      const todoObj = {
        id: nanoid(),
        content: this.content,
        done: false
      }
      this.todoArr.unshift(todoObj)
      this.content = ''
    }
  }
}
</script>


<template>
  <div class="todo-header">
    <input type="text" placeholder="请输入你的任务名称，按回车键确认" v-model="content" @keydown.enter="addTodo"/>
  </div>
</template>

<style scoped>
.todo-header input {
  width: 560px;
  height: 28px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 4px 7px;
}

.todo-header input:focus {
  outline: none;
  border-color: #66afe9;
  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
}

/*main*/
.todo-main {
  margin-top: 10px;
  border: 1px solid #ddd;
  border-radius: 2px;
  padding: 0;
}

.todo-empty {
  height: 40px;
  line-height: 40px;
  border: 1px solid #ddd;
  border-radius: 2px;
  padding-left: 5px;
  margin-top: 10px;
}
</style>
